640 lines
20 KiB
C
640 lines
20 KiB
C
/* Part of CPP library.
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This header defines all the internal data structures and functions
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that need to be visible across files. It's called cpphash.h for
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historical reasons. */
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#ifndef GCC_CPPHASH_H
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#define GCC_CPPHASH_H
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#include "hashtable.h"
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#if defined HAVE_ICONV_H && defined HAVE_ICONV
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#include <iconv.h>
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#else
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#define HAVE_ICONV 0
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typedef int iconv_t; /* dummy */
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#endif
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struct directive; /* Deliberately incomplete. */
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struct pending_option;
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struct op;
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struct _cpp_strbuf;
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typedef bool (*convert_f) (iconv_t, const unsigned char *, size_t,
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struct _cpp_strbuf *);
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struct cset_converter
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{
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convert_f func;
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iconv_t cd;
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};
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#ifndef HAVE_UCHAR
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typedef unsigned char uchar;
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#endif
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#define U (const uchar *) /* Intended use: U"string" */
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#define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t))
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/* Test if a sign is valid within a preprocessing number. */
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#define VALID_SIGN(c, prevc) \
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(((c) == '+' || (c) == '-') && \
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((prevc) == 'e' || (prevc) == 'E' \
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|| (((prevc) == 'p' || (prevc) == 'P') \
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&& CPP_OPTION (pfile, extended_numbers))))
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#define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
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#define CPP_BUFFER(PFILE) ((PFILE)->buffer)
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#define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base)
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#define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
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/* Maximum nesting of cpp_buffers. We use a static limit, partly for
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efficiency, and partly to limit runaway recursion. */
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#define CPP_STACK_MAX 200
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/* Host alignment handling. */
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struct dummy
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{
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char c;
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union
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{
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double d;
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int *p;
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} u;
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};
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#define DEFAULT_ALIGNMENT offsetof (struct dummy, u)
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#define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
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#define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT)
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/* Each macro definition is recorded in a cpp_macro structure.
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Variadic macros cannot occur with traditional cpp. */
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struct cpp_macro
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{
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/* Parameters, if any. */
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cpp_hashnode **params;
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/* Replacement tokens (ISO) or replacement text (traditional). See
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comment at top of cpptrad.c for how traditional function-like
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macros are encoded. */
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union
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{
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cpp_token *tokens;
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const uchar *text;
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} exp;
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/* Definition line number. */
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fileline line;
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/* Number of tokens in expansion, or bytes for traditional macros. */
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unsigned int count;
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/* Number of parameters. */
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unsigned short paramc;
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/* If a function-like macro. */
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unsigned int fun_like : 1;
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/* If a variadic macro. */
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unsigned int variadic : 1;
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/* If macro defined in system header. */
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unsigned int syshdr : 1;
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/* Nonzero if it has been expanded or had its existence tested. */
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unsigned int used : 1;
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};
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#define _cpp_mark_macro_used(NODE) do { \
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if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN)) \
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(NODE)->value.macro->used = 1; } while (0)
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/* A generic memory buffer, and operations on it. */
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typedef struct _cpp_buff _cpp_buff;
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struct _cpp_buff
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{
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struct _cpp_buff *next;
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unsigned char *base, *cur, *limit;
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};
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extern _cpp_buff *_cpp_get_buff (cpp_reader *, size_t);
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extern void _cpp_release_buff (cpp_reader *, _cpp_buff *);
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extern void _cpp_extend_buff (cpp_reader *, _cpp_buff **, size_t);
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extern _cpp_buff *_cpp_append_extend_buff (cpp_reader *, _cpp_buff *, size_t);
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extern void _cpp_free_buff (_cpp_buff *);
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extern unsigned char *_cpp_aligned_alloc (cpp_reader *, size_t);
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extern unsigned char *_cpp_unaligned_alloc (cpp_reader *, size_t);
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#define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
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#define BUFF_FRONT(BUFF) ((BUFF)->cur)
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#define BUFF_LIMIT(BUFF) ((BUFF)->limit)
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/* #include types. */
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enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
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union utoken
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{
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const cpp_token *token;
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const cpp_token **ptoken;
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};
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/* A "run" of tokens; part of a chain of runs. */
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typedef struct tokenrun tokenrun;
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struct tokenrun
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{
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tokenrun *next, *prev;
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cpp_token *base, *limit;
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};
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/* Accessor macros for struct cpp_context. */
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#define FIRST(c) ((c)->u.iso.first)
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#define LAST(c) ((c)->u.iso.last)
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#define CUR(c) ((c)->u.trad.cur)
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#define RLIMIT(c) ((c)->u.trad.rlimit)
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typedef struct cpp_context cpp_context;
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struct cpp_context
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{
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/* Doubly-linked list. */
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cpp_context *next, *prev;
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union
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{
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/* For ISO macro expansion. Contexts other than the base context
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are contiguous tokens. e.g. macro expansions, expanded
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argument tokens. */
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struct
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{
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union utoken first;
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union utoken last;
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} iso;
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/* For traditional macro expansion. */
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struct
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{
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const uchar *cur;
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const uchar *rlimit;
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} trad;
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} u;
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/* If non-NULL, a buffer used for storage related to this context.
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When the context is popped, the buffer is released. */
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_cpp_buff *buff;
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/* For a macro context, the macro node, otherwise NULL. */
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cpp_hashnode *macro;
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/* True if utoken element is token, else ptoken. */
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bool direct_p;
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};
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struct lexer_state
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{
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/* Nonzero if first token on line is CPP_HASH. */
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unsigned char in_directive;
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/* Nonzero if in a directive that will handle padding tokens itself.
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#include needs this to avoid problems with computed include and
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spacing between tokens. */
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unsigned char directive_wants_padding;
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/* True if we are skipping a failed conditional group. */
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unsigned char skipping;
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/* Nonzero if in a directive that takes angle-bracketed headers. */
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unsigned char angled_headers;
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/* Nonzero if in a #if or #elif directive. */
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unsigned char in_expression;
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/* Nonzero to save comments. Turned off if discard_comments, and in
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all directives apart from #define. */
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unsigned char save_comments;
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/* Nonzero if lexing __VA_ARGS__ is valid. */
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unsigned char va_args_ok;
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/* Nonzero if lexing poisoned identifiers is valid. */
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unsigned char poisoned_ok;
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/* Nonzero to prevent macro expansion. */
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unsigned char prevent_expansion;
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/* Nonzero when parsing arguments to a function-like macro. */
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unsigned char parsing_args;
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/* Nonzero to skip evaluating part of an expression. */
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unsigned int skip_eval;
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};
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/* Special nodes - identifiers with predefined significance. */
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struct spec_nodes
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{
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cpp_hashnode *n_defined; /* defined operator */
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cpp_hashnode *n_true; /* C++ keyword true */
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cpp_hashnode *n_false; /* C++ keyword false */
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cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
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};
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typedef struct _cpp_line_note _cpp_line_note;
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struct _cpp_line_note
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{
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/* Location in the clean line the note refers to. */
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const uchar *pos;
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/* Type of note. The 9 'from' trigraph characters represent those
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trigraphs, '\\' an escaped newline, ' ' an escaped newline with
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intervening space, and anything else is invalid. */
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unsigned int type;
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};
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/* Represents the contents of a file cpplib has read in. */
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struct cpp_buffer
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{
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const uchar *cur; /* Current location. */
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const uchar *line_base; /* Start of current physical line. */
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const uchar *next_line; /* Start of to-be-cleaned logical line. */
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const uchar *buf; /* Entire character buffer. */
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const uchar *rlimit; /* Writable byte at end of file. */
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_cpp_line_note *notes; /* Array of notes. */
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unsigned int cur_note; /* Next note to process. */
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unsigned int notes_used; /* Number of notes. */
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unsigned int notes_cap; /* Size of allocated array. */
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struct cpp_buffer *prev;
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/* Pointer into the file table; non-NULL if this is a file buffer.
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Used for include_next and to record control macros. */
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struct _cpp_file *file;
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/* Value of if_stack at start of this file.
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Used to prohibit unmatched #endif (etc) in an include file. */
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struct if_stack *if_stack;
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/* True if we need to get the next clean line. */
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bool need_line;
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/* True if we have already warned about C++ comments in this file.
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The warning happens only for C89 extended mode with -pedantic on,
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or for -Wtraditional, and only once per file (otherwise it would
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be far too noisy). */
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unsigned char warned_cplusplus_comments;
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/* True if we don't process trigraphs and escaped newlines. True
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for preprocessed input, command line directives, and _Pragma
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buffers. */
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unsigned char from_stage3;
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/* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
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true, a CPP_EOF token is then returned. Otherwise, the next
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token from the enclosing buffer is returned. */
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unsigned int return_at_eof : 1;
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/* The directory of the this buffer's file. Its NAME member is not
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allocated, so we don't need to worry about freeing it. */
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struct cpp_dir dir;
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/* Used for buffer overlays by cpptrad.c. */
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const uchar *saved_cur, *saved_rlimit;
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};
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/* A cpp_reader encapsulates the "state" of a pre-processor run.
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Applying cpp_get_token repeatedly yields a stream of pre-processor
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tokens. Usually, there is only one cpp_reader object active. */
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struct cpp_reader
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{
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/* Top of buffer stack. */
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cpp_buffer *buffer;
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/* Overlaid buffer (can be different after processing #include). */
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cpp_buffer *overlaid_buffer;
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/* Lexer state. */
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struct lexer_state state;
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/* Source line tracking. */
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struct line_maps line_maps;
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const struct line_map *map;
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fileline line;
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/* The line of the '#' of the current directive. */
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fileline directive_line;
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/* Memory buffers. */
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_cpp_buff *a_buff; /* Aligned permanent storage. */
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_cpp_buff *u_buff; /* Unaligned permanent storage. */
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_cpp_buff *free_buffs; /* Free buffer chain. */
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/* Context stack. */
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struct cpp_context base_context;
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struct cpp_context *context;
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/* If in_directive, the directive if known. */
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const struct directive *directive;
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/* Search paths for include files. */
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struct cpp_dir *quote_include; /* "" */
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struct cpp_dir *bracket_include; /* <> */
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struct cpp_dir no_search_path; /* No path. */
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/* Chain of all hashed _cpp_file instances. */
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struct _cpp_file *all_files;
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struct _cpp_file *main_file;
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/* File and directory hash table. */
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struct htab *file_hash;
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struct htab *dir_hash;
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struct file_hash_entry *file_hash_entries;
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unsigned int file_hash_entries_allocated, file_hash_entries_used;
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/* Nonzero means don't look for #include "foo" the source-file
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directory. */
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bool quote_ignores_source_dir;
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/* Nonzero if any file has contained #pragma once or #import has
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been used. */
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bool seen_once_only;
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/* Multiple include optimization. */
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const cpp_hashnode *mi_cmacro;
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const cpp_hashnode *mi_ind_cmacro;
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bool mi_valid;
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/* Lexing. */
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cpp_token *cur_token;
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tokenrun base_run, *cur_run;
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unsigned int lookaheads;
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/* Nonzero prevents the lexer from re-using the token runs. */
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unsigned int keep_tokens;
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/* Error counter for exit code. */
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unsigned int errors;
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/* Buffer to hold macro definition string. */
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unsigned char *macro_buffer;
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unsigned int macro_buffer_len;
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/* Descriptor for converting from the source character set to the
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execution character set. */
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struct cset_converter narrow_cset_desc;
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/* Descriptor for converting from the source character set to the
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wide execution character set. */
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struct cset_converter wide_cset_desc;
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/* Date and time text. Calculated together if either is requested. */
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const uchar *date;
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const uchar *time;
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/* EOF token, and a token forcing paste avoidance. */
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cpp_token avoid_paste;
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cpp_token eof;
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/* Opaque handle to the dependencies of mkdeps.c. */
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struct deps *deps;
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/* Obstack holding all macro hash nodes. This never shrinks.
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See cpphash.c */
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struct obstack hash_ob;
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/* Obstack holding buffer and conditional structures. This is a
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real stack. See cpplib.c. */
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struct obstack buffer_ob;
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/* Pragma table - dynamic, because a library user can add to the
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list of recognized pragmas. */
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struct pragma_entry *pragmas;
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/* Call backs to cpplib client. */
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struct cpp_callbacks cb;
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/* Identifier hash table. */
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struct ht *hash_table;
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/* Expression parser stack. */
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struct op *op_stack, *op_limit;
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/* User visible options. */
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struct cpp_options opts;
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/* Special nodes - identifiers with predefined significance to the
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preprocessor. */
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struct spec_nodes spec_nodes;
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/* Whether cpplib owns the hashtable. */
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bool our_hashtable;
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/* Traditional preprocessing output buffer (a logical line). */
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struct
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{
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uchar *base;
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uchar *limit;
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uchar *cur;
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fileline first_line;
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} out;
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/* Used to save the original line number during traditional
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preprocessing. */
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unsigned int saved_line;
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/* A saved list of the defined macros, for dependency checking
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of precompiled headers. */
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struct cpp_savedstate *savedstate;
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};
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/* Character classes. Based on the more primitive macros in safe-ctype.h.
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If the definition of `numchar' looks odd to you, please look up the
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definition of a pp-number in the C standard [section 6.4.8 of C99].
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In the unlikely event that characters other than \r and \n enter
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the set is_vspace, the macro handle_newline() in cpplex.c must be
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updated. */
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#define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
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#define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
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#define is_numchar(x) ISIDNUM(x)
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#define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
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#define is_numstart(x) ISDIGIT(x)
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#define is_hspace(x) ISBLANK(x)
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#define is_vspace(x) IS_VSPACE(x)
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#define is_nvspace(x) IS_NVSPACE(x)
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#define is_space(x) IS_SPACE_OR_NUL(x)
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/* This table is constant if it can be initialized at compile time,
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which is the case if cpp was compiled with GCC >=2.7, or another
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compiler that supports C99. */
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#if HAVE_DESIGNATED_INITIALIZERS
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extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
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#else
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extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
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#endif
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/* Macros. */
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#define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
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#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
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#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
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/* In cpperror.c */
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extern int _cpp_begin_message (cpp_reader *, int, fileline, unsigned int);
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/* In cppmacro.c */
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extern void _cpp_free_definition (cpp_hashnode *);
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extern bool _cpp_create_definition (cpp_reader *, cpp_hashnode *);
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extern void _cpp_pop_context (cpp_reader *);
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extern void _cpp_push_text_context (cpp_reader *, cpp_hashnode *,
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const uchar *, size_t);
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extern bool _cpp_save_parameter (cpp_reader *, cpp_macro *, cpp_hashnode *);
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extern bool _cpp_arguments_ok (cpp_reader *, cpp_macro *, const cpp_hashnode *,
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unsigned int);
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extern const uchar *_cpp_builtin_macro_text (cpp_reader *, cpp_hashnode *);
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int _cpp_warn_if_unused_macro (cpp_reader *, cpp_hashnode *, void *);
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/* In cpphash.c */
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extern void _cpp_init_hashtable (cpp_reader *, hash_table *);
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extern void _cpp_destroy_hashtable (cpp_reader *);
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/* In cppfiles.c */
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typedef struct _cpp_file _cpp_file;
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extern _cpp_file *_cpp_find_file (cpp_reader *, const char *fname,
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cpp_dir *start_dir, bool fake, int);
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|
extern bool _cpp_find_failed (_cpp_file *);
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|
extern void _cpp_mark_file_once_only (cpp_reader *, struct _cpp_file *);
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|
extern void _cpp_fake_include (cpp_reader *, const char *);
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|
extern bool _cpp_stack_file (cpp_reader *, _cpp_file*, bool);
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|
extern bool _cpp_stack_include (cpp_reader *, const char *, int,
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|
enum include_type);
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|
extern int _cpp_compare_file_date (cpp_reader *, const char *, int);
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|
extern void _cpp_report_missing_guards (cpp_reader *);
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|
extern void _cpp_init_files (cpp_reader *);
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|
extern void _cpp_cleanup_files (cpp_reader *);
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|
extern void _cpp_pop_file_buffer (cpp_reader *, struct _cpp_file *);
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|
|
|
/* In cppexp.c */
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|
extern bool _cpp_parse_expr (cpp_reader *);
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|
extern struct op *_cpp_expand_op_stack (cpp_reader *);
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|
|
|
/* In cpplex.c */
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|
extern void _cpp_process_line_notes (cpp_reader *, int);
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|
extern void _cpp_clean_line (cpp_reader *);
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|
extern bool _cpp_get_fresh_line (cpp_reader *);
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|
extern bool _cpp_skip_block_comment (cpp_reader *);
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|
extern cpp_token *_cpp_temp_token (cpp_reader *);
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|
extern const cpp_token *_cpp_lex_token (cpp_reader *);
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|
extern cpp_token *_cpp_lex_direct (cpp_reader *);
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|
extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *);
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|
extern void _cpp_init_tokenrun (tokenrun *, unsigned int);
|
|
|
|
/* In cppinit.c. */
|
|
extern void _cpp_maybe_push_include_file (cpp_reader *);
|
|
|
|
/* In cpplib.c */
|
|
extern int _cpp_test_assertion (cpp_reader *, unsigned int *);
|
|
extern int _cpp_handle_directive (cpp_reader *, int);
|
|
extern void _cpp_define_builtin (cpp_reader *, const char *);
|
|
extern char ** _cpp_save_pragma_names (cpp_reader *);
|
|
extern void _cpp_restore_pragma_names (cpp_reader *, char **);
|
|
extern void _cpp_do__Pragma (cpp_reader *);
|
|
extern void _cpp_init_directives (cpp_reader *);
|
|
extern void _cpp_init_internal_pragmas (cpp_reader *);
|
|
extern void _cpp_do_file_change (cpp_reader *, enum lc_reason, const char *,
|
|
unsigned int, unsigned int);
|
|
extern void _cpp_pop_buffer (cpp_reader *);
|
|
|
|
/* In cpptrad.c. */
|
|
extern bool _cpp_scan_out_logical_line (cpp_reader *, cpp_macro *);
|
|
extern bool _cpp_read_logical_line_trad (cpp_reader *);
|
|
extern void _cpp_overlay_buffer (cpp_reader *pfile, const uchar *, size_t);
|
|
extern void _cpp_remove_overlay (cpp_reader *);
|
|
extern bool _cpp_create_trad_definition (cpp_reader *, cpp_macro *);
|
|
extern bool _cpp_expansions_different_trad (const cpp_macro *,
|
|
const cpp_macro *);
|
|
extern uchar *_cpp_copy_replacement_text (const cpp_macro *, uchar *);
|
|
extern size_t _cpp_replacement_text_len (const cpp_macro *);
|
|
|
|
/* In cppcharset.c. */
|
|
extern cppchar_t _cpp_valid_ucn (cpp_reader *, const uchar **,
|
|
const uchar *, int);
|
|
extern void _cpp_destroy_iconv (cpp_reader *);
|
|
extern bool _cpp_interpret_string_notranslate (cpp_reader *,
|
|
const cpp_string *,
|
|
cpp_string *);
|
|
extern uchar *_cpp_convert_input (cpp_reader *, const char *, uchar *,
|
|
size_t, size_t, off_t *);
|
|
extern const char *_cpp_default_encoding (void);
|
|
|
|
|
|
/* Utility routines and macros. */
|
|
#define DSC(str) (const uchar *)str, sizeof str - 1
|
|
#define xnew(T) (T *) xmalloc (sizeof(T))
|
|
#define xcnew(T) (T *) xcalloc (1, sizeof(T))
|
|
#define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
|
|
#define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
|
|
#define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
|
|
|
|
/* These are inline functions instead of macros so we can get type
|
|
checking. */
|
|
static inline int ustrcmp (const uchar *, const uchar *);
|
|
static inline int ustrncmp (const uchar *, const uchar *, size_t);
|
|
static inline size_t ustrlen (const uchar *);
|
|
static inline uchar *uxstrdup (const uchar *);
|
|
static inline uchar *ustrchr (const uchar *, int);
|
|
static inline int ufputs (const uchar *, FILE *);
|
|
|
|
static inline int
|
|
ustrcmp (const uchar *s1, const uchar *s2)
|
|
{
|
|
return strcmp ((const char *)s1, (const char *)s2);
|
|
}
|
|
|
|
static inline int
|
|
ustrncmp (const uchar *s1, const uchar *s2, size_t n)
|
|
{
|
|
return strncmp ((const char *)s1, (const char *)s2, n);
|
|
}
|
|
|
|
static inline size_t
|
|
ustrlen (const uchar *s1)
|
|
{
|
|
return strlen ((const char *)s1);
|
|
}
|
|
|
|
static inline uchar *
|
|
uxstrdup (const uchar *s1)
|
|
{
|
|
return (uchar *) xstrdup ((const char *)s1);
|
|
}
|
|
|
|
static inline uchar *
|
|
ustrchr (const uchar *s1, int c)
|
|
{
|
|
return (uchar *) strchr ((const char *)s1, c);
|
|
}
|
|
|
|
static inline int
|
|
ufputs (const uchar *s, FILE *f)
|
|
{
|
|
return fputs ((const char *)s, f);
|
|
}
|
|
|
|
#endif /* ! GCC_CPPHASH_H */
|